diff --git a/contracts/extensions/package.json b/contracts/extensions/package.json
index b0542f34df..720af642e1 100644
--- a/contracts/extensions/package.json
+++ b/contracts/extensions/package.json
@@ -78,6 +78,7 @@
         "@0x/contracts-dev-utils": "^0.1.0-beta.1",
         "@0x/contracts-erc20": "^2.3.0-beta.1",
         "@0x/contracts-erc721": "^2.2.0-beta.1",
+        "@0x/contracts-exchange": "^2.2.0-beta.1",
         "@0x/contracts-exchange-libs": "^3.1.0-beta.1",
         "@0x/contracts-utils": "^3.3.0-beta.1",
         "@0x/order-utils": "^8.5.0-beta.1",